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4 years ago

In the electron configuration [ar]4s23d104p4, which are valence electrons?

Chemistry

2 answers:

Zigmanuir [339]4 years ago

7 0

2,10,4 are valence electrons

Sergio039 [100]4 years ago

3 0

Answer:

The valence electrons are the one in the subshells 4s and 4p.

Explanation:

Let's consider the following electron configuration.

[Ar] 4s² 3d¹⁰ 4p⁴

The valence electrons are the ones in the last level, that is, the level 4. Here, there are two electrons in the s subshell and four electrons in the p subshell. In total, there are 2 + 4 = 6 valence electrons.

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A gas balloon has a volume of 106.0 liters when the temperature is 25.0 °C and the pressure is 740.0 mm Hg. What will its volume

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Answer : The final volume of gas will be, 103.3 L

Explanation :

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

where,

$P_1$ = initial pressure of gas = 740.0 mmHg = 98.4 kPa

Conversion used : (1 mmHg = 0.133 kPa)

$P_2$ = final pressure of gas = 99.3 kPa

$V_1$ = initial volume of gas = 106.0 L

$V_2$ = final volume of gas = ?

$T_1$ = initial temperature of gas = $25.0^oC=273+25.0=298K$

$T_2$ = final temperature of gas = $20.0^oC=273+20.0=293K$

Now put all the given values in the above equation, we get:

$\frac{98.4kPa\times 106.0L}{298K}=\frac{99.3kPa\times V_2}{293K}$

$V_2=103.3L$

Therefore, the final volume of gas will be, 103.3 L

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4 years ago

Which type of energy transformation occurs when a flashlight shines?

never [62]

Answer:

chemical to light

Explanation:

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3 years ago

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How many moles of MgCO3 are present in 252.939 grams of MgCO3?

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The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles MgCO3, or 84.3139 grams.

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